Reliability Evaluation for Turbo Pump Component in Two-phase Development with No Failure Data

Turbo pump plays a vital role in the success of a rocket launch. High reliability is thus required for turbo pump as well as its components. During the development of turbo pump component, multiple phases are usually involved with a testing after each phase. Such testing often obtains no failures, due to the high reliability of the component and the short testing period. It is not reliable to evaluate the component reliability only rely on the no failure data. To make full use the no failure data in two development phases, Bayesian method is proposed, combining with the data from similar component and experts' estimate. A case study is carried out to illustrate that the proposed reliability evaluation method yields more accurate result than the method only using no failure data.